Process for extracting oils from solids.



G. TURNER..

PROCESS POS BXTRAGTING OILS FROM SOLIDS.

APPLICATION-FILED JUNE 26,1911.

Patented July 2, 191,4.

ASS@

i UNITED STATES PATENT oEEioE.

CHARLES TURNER, F CHICAGO, ILLINOIS. i

PROCESS FOR E XTRACTING OILS FRCM SOLIDS.

Specification of Letters Patent.

Application led Iune 26, 1911.

Patented July 21, 1914. Serial No. 635,503.

To all 'whom t may concern:

Bc it known that I, CHARLES TURNER, a

citizen of the United States, and resident of and has especialreference to means for preventing the loss of the solvent agent when it assumes the form of vapor.

The method may be practised by means of various forms of apparatus. There is shown in the accompanying drawings a sectional view of an apparatus suitable for this purpose.

The device shown in the drawin s comprises a plurality of cylinders deslgnated respectively by the numerals 12, 30 and 42. These cylinders are set at an incline. The solid material is received at the lower end of each and is discharged from the upper end thereof. The cylinder'12 is provided with a receiving hopper 10 discharging into the cylinder at 11. A tubular shaft 16 is suitably journaled upon the axis of the cylinder and upon this shaft there is mounted a spiral conveyer 16 which carries the material throughthe cylinder and discharges it therefrom through a down-spout 29 into the lower and receiving end of the cylinder 30. The major portion of the cylinder 12 is inclosed within a jacket 13 and the inclosed portion of the cylinder wall -is foraminous as indicated at 14. lA solvent 4material such as gasolene is delivered to the cylinder throughthe shaft 16 which is freely perforated'as shown at 19, the solvent being de-- livered to the boreof the shaft through a pipe 17 which is connected to the cylinder through the stuling box 18. The cylinder 30 and its appurtenances are substantially identical with the cylinder 12 andits appurtenances, there being prese-nt anincflosing jacket 34', the walls of the cylinder inclosed by the'jacke't being foraminous as shown at 35; there being present atubular shaft 32 freely perforated asshown at 33, a spiral conveyer 31 mounted upon the shaft, and a pipe 36 for delivering the; solvent to the upper end of the shaft. The material iis carried through the cylinder and discharged therefrom ,through the down-spout 41 delivering to the lower end of the third cylinder 42 which gwith. its appurtenances is substantially identical in construction with the other cylinders so far as described, there being present an inclosing jacket 43, a tubular shaft 45 hav jing a stuing box 46. at its end, and being Ifreely perforated as shown at 47; a spiral conveyer 44 mounted upon the shaft and ,the walls ofthe cylinder being foraminous fas, shown at 92.

The pipe 17 leads from t-he delivery side of a pump 72, the suction side of which is connected byv means of a pipe 73 with a tank 93 containing the solvent material. A pipe 20 leads from the jacket 13 at or above the level of the throat 11 of the hopper 10, discharging to a receiving tank 21. The pipe 2O is provided wit-h a controlling valve 22. Drain pipes 23, 24 lead from the jacket 13 at lower levels than the connection therewith of the pipe 20 and each is provided with a controlling valve 25, 26. A valve-controlled pipe 28 leads from the lower end of the cylinder 12. The pipes 23, 24, and 28 all deliver to the tank 21. In the normal 'action of the apparatus the solvent delivered into thev material through the shaft perforations 19 escapes into the jacket 13 through the perforations in the cylinder 12, carrying with in much of the oils with which the material is charged. These liquids accumulate within the casing 13 to the level of the pipe 20, the valve of which is normally open; the valves of the pipes 23, 24 and 28 being closed. This accumulation of liquid within the jacket 13 and the lower end of the cylinder 12 forms al liquid seal for preventing vapors from escaping through the hopper.v

Within the tank 21 the oils will tend to be separated to some extent from the solvent by gravity and are carried off through an overow pipe 74 to an evaporator 75, where so much of the solvent material as may be lcarriedofll with the oils in vaporspasses off through the pipe 76 to a condensing coil 56, from which it is discharged through the pipe 77 to a receiving tank 78. The oilsescape from the evaporator through the pipe 79 to a suitable separator 80.

Solvent materialv is delivered to the cylinder 30 from the tank 8 byy means of la pump 81 connected with this tank by a pipe'82. This solvent being delivered into the ma? terial as it passes throu h the cylinder 30 completesthe washin t e liquids draining into the casing 34a-n accumulating therein to the level of the bottom of the lower end of the down-spout 29, and thus formin the liquid seal for prevent-ing the escape o any 'the solvent'material which may have been carried with it from the cylinder 30. -For this purpose steam or other heating fluid 1s delivered into the cylinder through the shaft and the vapors escape into the jacket 4 3, from which they are discharged through nipples 52, 53 and 54 into a header 51 and being conveyed thence through 'a plpe 55 to the condensing coil 56. A steam trap 85 1s placed in the pipe 77 for eliminating the Wa- .ter of condensation.

Pipes 48 and 49 lead from the lower ends respectively of the jacket 43 and cylinder 42 to the tank 50 for the purpose o carr ing ofi any liquids which may be drained rom the material.

In order to prevent the vapors from escaping from the cylinder 42 backwardly through the down-spout 41, or forwardly through the delivery-spout 57 through which 'the material is finally discharged from the apparatus, steam jets are introduced into the spouts 41 and 57 and are directed in each case toward the chamber` of the cylinder 42. This l is accomplished in the apparatus shown in the drawingsby providing hollow belts 58 and 61 4for encircling respectively the spouts 41 and 57. An annular Vseries of small discharge openings 60 and 63 leading through the walls of the pipes 41 and 57 form the chambers of these belts, in the one case being 45 directed downwardly and in the other case 'being directed upwardly. Pipes 59 and 62 are shown as entering the vchambers of the hollow belts. The jets `of steam or other heated iuid which may thus be discharged intothe chamber of thev cylinder 42 constitute seals for preventing the escape of vapors from the cylinder.

The apparatus is shown as being mounted in part upon a floor 89 and part upon an upper floor 90 of a building. Power is applied to the several shafts from a belt pulley 64 mounted upon the shaft 65 and which is provided with pinions 66, 67 and 68 meshing with gear wheels 69, 70 and 71 fixed upon the several shafts. ,Safetfy vents 86, 87 lead from the upper ends o and 30. v

The apparatus as described'forms the subject of a pending application for patent Serial No. 631,440 filed June 5, 1911, made by the cylinders 12 this applicant jointly with Harry J. Floodr but the process maybe vcarried out by various other means such as the apparatus forming the subject'of the joint applicationSerial N o. 633,126 filed June 14,1911 of the said Turner' and Flood. The essential features of the invention forming the subject of this application are kthe liquid seals for preventing the escape of vapors backwardly from the chambers within which the dissolving or washing operation is performed vand the vapor seal for reventing the escape of vapors from the ast or drying chamber.

I claim as my inventionl 1. The herein described process of extracting oils from solids, consisting in passing the solid material through an upwardly inclined chamber, washing the material with a volatile solvent within the chamber, maintaining the liquid drained from the material within the chamber at a suitable level to seal the receiving end of the chamber, draining the liquids laterally from the material within the chamber into a separating tank, and discharging the material from the chamber through a liquid seal.

2. The herein described rocess of extracting oils from solids consisting in passing the solid material through. a chamber, washing the :material with a volatile solvent within -such chamber, discharging the material from the chamber through a liquid seal, then passing the material through a second chamber, Washing it therein with a volatile solvent, discharging the material from such chamber into and passing it through a third chamber, applying heat to the material while in such third chamber for vaporizing the solvent remainin in the material, discharging the material rom such chamber, and introducing into the material as it enters and leaves such chamber a vapor under pressure in the form of jets directed toward the chamber in both cases.

3. The herein described process of treating solid material for extracting oils therefrom consisting in first washing the material with a volatile solvent, then passing thematerial through a chamber and heating it therein for vaporizing the solvent remaining in the material, and sealing the receiving and discharge ports of such chamber against the escape of vapors therethrough by directing into such chamber through such ports a .vapor under pressure.

5. The herein described process of extractlaterallyand discharging it to a separating ing oils from solids, consisting in delivering tank and discharging the material from the the mgiterizill to tllie lower end of an inclined chamber through a liquid seal. clam er t roug a liquid seal conveying the material lthrough the chainlier, deliver- CHARLES TURNER' ing a volatile solvent to the center of the Witnesses: mass of material as it passes through` the LoUIs K. GrLLsoN, chamber, draining the liquid from the mass E. M. KLATCHER. 

